Griffin’s Sport Armband for iPhone ($30) — a product name that fills my head with visions of iPhones running around the track (“Go, go, little 3GS! You can do it! You’re not too old!”) — allows you to get up and go without worrying about your iPhone. It’s a decent attempt at making workout clothing for the iPhone, but just as with those just-a-bit-too-tight yoga pants, there are a few bulges that might cause a few sideways looks in the gym.

A new patent discovered by Patently Apple reveals that Apple is working on its own fitness center application for the iPhone.

The patent titled “Systems and Methods for Accessing Personalized Fitness Services Using a Portable Electronic Device” was originally filed in October, 2009, and describes an app that can benefit its users by helping them with their diet; suggesting when they should go to the gym and what exercises they should do; and allowing them to compete with friends and be ranked on their performance.

Services are broken down into four categories: New Customers, Getting There, In the Gym, and Post Workout; which will help users find their nearest fitness center and motivate them to actively attend, encourage them to workout and suggest different exercises, and provide post-workout motivation and fitness tracking features.